As the CDR-DAO author posted in his website "...Due to license issues with the libedc_ecc library that is used by
and distributed with cdrdao I have to temporarily freeze this
project. All releases have been removed.

And continues "...Cdrdao has the explicit permission to use the libedc_ecc library but the author of the libedc_ecc sources does not allow to release it under the GPL. In this sense cdrdao violated the author's license. Of course this happened due to a lack of information and was not done intentionally.
I am currently working on a replacement for the libedc_ecc library
that can be fully put under the GPL. Please stay tuned, cdrdao will
be back in some weeks..."